swan.canvasGetImageData

解释：返回一个数组，用来描述 canvas 区域隐含的像素数据。在自定义组件下，操作组件内 <canvas> 组件。

方法参数

Object object

object参数说明

success返回参数说明

示例

在开发者工具中预览效果

扫码体验

请使用百度APP扫码

图片示例

代码示例

  1. <view class="wrap">    <canvas canvas-id="canvas"></canvas>    <button type="primary" bindtap="canvasGetImageData">canvasGetImageData</button></view>
  1. Page({    onReady() {        const CanvasContext = swan.createCanvasContext('canvas');        CanvasContext.setFillStyle('#0f0f0f');        CanvasContext.arc(100, 100, 50, 0, 2 * Math.PI);        CanvasContext.fill();        CanvasContext.beginPath();        CanvasContext.setStrokeStyle('#0000ff');        CanvasContext.moveTo(90, 70);        CanvasContext.lineTo(70, 80);        CanvasContext.lineTo(90, 80);        CanvasContext.closePath();        CanvasContext.stroke();        CanvasContext.beginPath();        CanvasContext.setStrokeStyle('#0000ff');        CanvasContext.moveTo(130, 70);        CanvasContext.lineTo(110, 80);        CanvasContext.lineTo(130, 80);        CanvasContext.closePath();        CanvasContext.stroke();        CanvasContext.beginPath();        CanvasContext.setFillStyle('#00ff00');        CanvasContext.arc(100, 100, 20, 0, 1 * Math.PI);        CanvasContext.fill();        CanvasContext.setFillStyle('#00ff00');        CanvasContext.setFontSize(12);        CanvasContext.fillText('haha', 165, 78);        CanvasContext.moveTo(100, 50);        CanvasContext.setStrokeStyle('#00ff00');        CanvasContext.bezierCurveTo(100, 25, 75, 25, 50, 50);        CanvasContext.stroke();        CanvasContext.moveTo(100, 50);        CanvasContext.quadraticCurveTo(75, 25, 50, 50);        CanvasContext.stroke();        CanvasContext.draw();    },    canvasGetImageData() {        swan.canvasGetImageData({            canvasId: 'canvas',            x: 0,           y: 0,            width: 100,            height: 100,            success: res => {                console.log('canvasGetImageData success', res);            },            fail: err => {                console.log('canvasGetImageData fail', err);            }        });    }});

错误码

Android

iOS